It's downloadable as a PG76IMG.zip file for those who are able to/want to flash it from Hboot instead of RUU connected to computer method.
I flashed my upgrade this way and it fully upgraded Radio, Hboot, Microp, etc.
I was XTC Clip S-OFF of course. It did not S-ON the phone.
1/ Download the file.
2/ Place it on the root of your SD Card.
3/ Power down and remove and replace battery.
4/ Hold Volume Down and Power On buttons at the same time.
5/ Follow the directions on screen.
6/ Replace file with your custom recovery and flash it if need be.